JPH0510942U - Air-conditioning outlet device - Google Patents

Abstract

(57) [Summary] [Purpose] An air-conditioning outlet formed by molding a housing by primary injection of synthetic resin, and then molding a plurality of blades by secondary injection of synthetic resin having a lower melting point in the housing. In the device, the rotational feeling of the blade is stabilized regardless of thermal expansion and contraction of the housing and the blade. [Structure] The support shaft 9 of the blade 3 has a surplus shaft portion 9a having the same diameter as the support shaft 9 and protruding outward from the shaft hole 6 of the housing 2.
And a flange 8 facing the inner surface of the housing 2 between the blade body 7 and the support shaft 9 of the blade 3.
To form.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air-conditioning air outlet device attached to an instrument panel or the like in an automobile, and in particular, it is formed by primary injection of synthetic resin and has a plurality of pairs of axial holes arranged coaxially on opposite side walls. A housing provided and molded by secondary injection of synthetic resin in this housing. A pair of spindles that rotatably fit in the shaft holes of each pair are provided at both ends of the blade main body so as to project. Concerning improvements that consist of multiple blades.

[0002]

[Prior Art]

 Such an air-conditioning outlet device is already known, as disclosed, for example, in Japanese Patent Publication No. 59-48745.

[0003]

[Problems to be solved by the device]

 In the conventional air-conditioning air outlet device, when the blade is formed by the secondary injection, the head end of each support shaft is formed with an enormous head that contacts the outer surface of the housing. This enlarging head has a function of being pressed against the outer surface of the housing due to thermal contraction after the blade is formed, and holding the rotational position of the blade by frictional resistance generated therebetween.

However, since the blade is relatively long in the supporting shaft direction, the amount of expansion and contraction in the supporting shaft direction is relatively large during use due to temperature changes in the surroundings, which causes friction between the enlarging head and the housing. There is a problem that the rotational feeling of the blade changes due to a large increase or decrease in resistance.

The present invention has been made in view of the above circumstances, and has a simple structure and an air conditioner that always provides a stable blade rotation feeling during use, even if the ambient temperature changes. An object of the present invention is to provide a blow-out device for use.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention continuously forms, on the support shaft, a surplus shaft portion having the same diameter and protruding to the outside of the housing, and between the support shaft and the blade body on the inner surface of the housing. It is characterized in that opposed flanges are formed.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 1, reference numeral 1 denotes an air-conditioning air outlet device for an automobile, which is a cylindrical housing 2 that is primary injection-molded with a synthetic resin (for example, ABS resin) and a housing 2 inside the housing 2. Is composed of a large number of blades 3, 3 ... Secondary-molded with a synthetic resin (eg polypropylene resin) having a lower melting point. After this secondary injection molding, all blades 3, 3 ... The links 4 interconnect each other. The housing 2 is mounted on an instrument panel of an automobile, and a ventilation duct (not shown) is connected to the left end in FIG. 1 to ventilate in the direction of arrow A.

As shown in FIGS. 1 to 3, when the housing 2 is molded, the upper and lower walls of the housing 2 are lined up and down, and the same number of pairs of bosses 5, 5; Are formed so that the inner ends thereof are projected inward on the inner surface of the housing 2 and are arranged in the left-right direction, and the bosses 5, 5 of each pair have shaft holes 6, 6 coaxial with each other.

Each blade 3 includes a blade main body 7, a pair of flanges 8 and 8 formed at both upper and lower ends of the blade main body 7 and facing inner end surfaces of the corresponding bosses 5 and 5, respectively. The flanges 8 and 8 are composed of a pair of support shafts 9 and 9 which project from the outer end surfaces of the flanges 8 and are fitted into the corresponding shaft holes 6 and 6 so as to be rotatable and slidable. At that time, the flanges 8 and 8 are formed to have a diameter larger than the thickness of the blade body 7, and the support shafts 9 and 9 are continuously provided with surplus shaft portions 9a and 9a having the same diameter and protruding outwardly of the housing 2. It is formed.

A pair of arms 11 and 11 connected to each other via a connecting pin 10 are provided on one side of the rear portion of each blade body 7 facing the side opposite to the ventilation direction A from the support shaft 9, Furthermore, a knob 12 is formed at the front end of some of the blade bodies 7 facing the ventilation direction A.

In molding a large number of blades 3, 3 ... Having such a structure, as shown in FIG. 4, the housing 2 which has already been molded is installed in the blade molding die 13 and its shaft hole 6 , 6 and the inner end surfaces of the bosses 5, 5 are exposed to the cavity 14 in the mold 13, and the cavity 14 is injection-filled with a predetermined synthetic resin. In this way, the secondary injection is completed, and all the blades 3, 3, ... Are molded at once. After cooling, the mold 13 is opened, and the housing 2, the blades 3, 3 ... Are taken out from the mold 13.

After that, a large number of C-shaped elastic connectors 4a, 4a ... Formed integrally with the link 4 are elastically engaged with the connecting pins 10 of all the blades 3, 3 ,. 3, 3, ... Are connected to each other. Therefore, if one knob 12 is swung left and right with the fingertips, all the blades 3, 3, ... Simultaneously rotate in the left and right directions around the respective support shafts 9,9, whereby the air from the housing 2 is removed. The blowing direction can be adjusted.

Next, the operation of this embodiment will be described.

Since the blades 3, 3, ... Formed in the housing 2 by secondary injection have a lower melting point than the housing 2, the contact portions between the blades 3, 3, ... And the housing 2 melt during the secondary injection molding. I never wear it. Rather, due to thermal contraction after the secondary injection molding, the support shafts 9, 9 of each blade 3 are separated from the inner surfaces of the shaft holes 6, 6 of the housing 2 and are brought into an appropriate frictional contact state with the inner surfaces. . Further, the flanges 8 and 8 of each blade 3 are also separated from the inner end surfaces of the bosses 5 and 5 of the housing 2. Therefore, when the blades 3 rotate, an appropriate friction torque is generated between the support shafts 9, 9 and the shaft holes 6, 6 to obtain a good rotational feeling, and the friction torque causes the blades 3 to move. It can be held in the desired pivot position.

During use, the housing 2 and the blades 3 expand or contract due to changes in the ambient temperature, and even if the blades 3 expand or contract in the directions of the support shafts 9 and 9, the support shafts 9 are always Since there is a surplus shaft portion 9a protruding outwardly of the housing 2 and having the same diameter as that of the housing 2, the surplus shaft portion 9a moves into and out of the corresponding shaft hole 6 in accordance with the expansion and contraction as described above and The fitting area with the shaft hole 6 can always be kept constant. Moreover, since the support shaft 9 and the shaft hole 6 have a relatively small diameter, the change in diameter due to temperature change is extremely small. As a result, the change in the friction torque between the support shaft 9 and the shaft hole 6 can be suppressed to be small, and the rotational feeling of the blades 3, 3, ... Can be stabilized.

Even when each blade 3 expands excessively in the direction of the support shaft 9, the flanges 8 and 8 formed at both ends of the blade body 7 come into contact with the inner end surfaces of the bosses 5 and 5, respectively. It is possible to avoid contact with the blade body 7 and thereby prevent the rotational feeling of the blades 3, 3, ...

[0018]

[Effect of the device]

 As described above, according to the present invention, a surplus shaft portion having the same diameter as that of the support shaft and projecting to the outside of the housing is continuously formed, and a flange facing the inner surface of the housing is provided between the support shaft and the blade body. As a result, the contact area and contact pressure of the support shaft and shaft hole are prevented from changing due to expansion and contraction of the housing and blade due to temperature changes during use, and the friction torque of the support shaft, and thus the blade The rotation feeling can be stabilized. Further, even when the blade is excessively expanded, the flange comes into contact with the inner surface of the housing to avoid contact between the blade main body and the flange, thereby preventing deterioration of the rotational feeling of the blade.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an air conditioning outlet device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is an explanatory view at the time of blade molding by secondary injection.

[Explanation of symbols]

 1 Air-conditioning outlet device 2 Housing 3 Blade 5 Boss 6 Shaft hole 7 Blade body 8 Flange 9 Spindle 9a Excess shaft portion

Claims (1)

[Claims for utility model registration] 1. A housing (2) formed by primary injection of synthetic resin, wherein a plurality of pairs of shaft holes (6) arranged coaxially on opposite side walls are provided. The blade body (7) is formed by secondary injection of synthetic resin in the housing (2) and has a pair of support shafts (9) rotatably fitted in the shaft holes (6) of each pair. An air-conditioning outlet device comprising a plurality of blades (3) projecting from both ends of the shaft (9). Is formed continuously, and a flange (8) facing the inner surface of the housing (2) is formed between the support shaft (9) and the blade body (7).